<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" Content="text/html; charset=utf-8" />
<title>javascript</title>
<style type="text/css">
body{font-size:12px;}
#txt{
height:400px;
width:600px;
border:#333 solid 1px;
padding:5px;}
p{
line-height:18px;
text-indent:2em;}
}
</style>
</head>
<body>
<h2 id="con">JavaScript课程</H2>
<div id="txt">
<h5>JavaScript为网页添加动态效果并实现与用户交互的功能。</h5>
<p>1. JavaScript入门篇，让不懂JS的你，快速了解JS。</p>
<p>2. JavaScript进阶篇，让你掌握JS的基础语法、函数、数组、事件、内置对象、BOM浏览器、DOM操作。</p>
<p>3. 学完以上两门基础课后，在深入学习JavaScript的变量作用域、事件、对象、运动、cookie、正则表达式、ajax等课程。</p>
</div>
<form>
<input type="button" value="改变颜色" onclick="Ccolor()">
<input type="button" value="改变宽高" onclick="Cwh()">
<input type="button" value="隐藏内容" onclick="N()">
<input type="button" value="显示内容" onclick="B()">
<input type="button" value="取消设置" onclick="Giveup()">
</form>
<script type="text/javascript">
function Ccolor(){
var one=document.getElementById("txt");
var one1=document.getElementById("con");
one.style.color="green";
one.style.backgroundColor="#CCC";
one1.style.color="green";
}
function Cwh(){
var two=document.getElementById("txt");
two.style.width="300px";
two.style.height="500px";
}
function N(){
var three=document.getElementById("txt");
three.style.display= "none";
}
function B(){
var four=document.getElementById("txt");
four.style.display= "block";
}
function Giveup(){
var five=confirm("是否取消设置？");
if(five==true){
var one=document.getElementById("txt");
var one1=document.getElementById("con");
var two=document.getElementById("txt");
var four=document.getElementById("txt");
one.style.color="black";
one.style.backgroundColor="white";
one1.style.color="black";
two.style.width="600px";
two.style.height="400px";
four.style.display= "block";
}
else{
}
}
</script>
</body>
</html>
<input type="button" value="改变颜色" onclick="Ccolor()">
<input type="button" value="改变宽高" onclick="Cwh()">
<input type="button" value="隐藏内容" onclick="N()">
<input type="button" value="显示内容" onclick="B()">
<input type="button" value="取消设置" onclick="Giveup()">我也是这样做的，但是点击按钮怎么没任何变化
用这个移除样式Obj.removeAttribute("style")